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Moderately critical

Cisco IOS Route Manipulation via ICMP Redirects

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Release Date:  2003-02-11    Last Update:  2003-10-17    Views:  13,953

Secunia Advisory SA8032

Where:

From local network

Impact:

Manipulation of data, DoS

Solution Status:

Vendor Patch

CVE Reference(s):

No CVE references.

Description


A vulnerability has been identified in Cisco IOS devices, which allows malicious people on a LAN (Local Area Network) to manipulate the device's routing table.

The vulnerability is caused by the device accepting ICMP redirects when IP routing has been explicitly disabled. By sending a bogus ICMP redirect a malicious person can exploit the vulnerability to disrupt communication by specifying a gateway with an unused IP address or intercept communication from the device by specifying the attacker's IP address as gateway.


Solution:
Upgrade to a fixed release of IOS:

Further details available to Secunia VIM customers

Provided and/or discovered by:
Ofir Arkin

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Cisco IOS Route Manipulation via ICMP Redirects

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